uKeg is not your typical glass growler which is known to let air into your beer that can make it flat in no time. Also, glass growlers do not travel well. uKeg is a pretty stylish growler that is also highly efficient thanks to its vacuum insulation which keeps the heat out. uKeg's designer, Growler Werks has drawn on 47 years of product-designing experience to make a growler that stores beer just like the best brewmasters recommend.